Fix ubuntu URL for OVAL

Signed-off-by: Tushar Goel <tushar.goel.dav@gmail.com>

Author: TG1999

vulnerabilities/importers/ubuntu.py

@@ -71,7 +71,7 @@ def __init__(self, *args, **kwargs):
         self.translations = {"less than": "<"}
 
     def _fetch(self):
-        base_url = "https://people.canonical.com/~ubuntu-security/oval"
+        base_url = "https://ubuntu.com/security/oval"
         releases = ["bionic", "trusty", "focal", "eoan", "xenial"]
         for release in releases:
             file_url = f"{base_url}/com.ubuntu.{release}.cve.oval.xml.bz2"  # nopep8